| /* |
| * Copyright © 2018 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include <gtest/gtest.h> |
| #include "brw_vec4.h" |
| #include "program/program.h" |
| |
| using namespace brw; |
| |
| class dead_code_eliminate_test : public ::testing::Test { |
| virtual void SetUp(); |
| |
| public: |
| struct brw_compiler *compiler; |
| struct gen_device_info *devinfo; |
| struct gl_context *ctx; |
| struct gl_shader_program *shader_prog; |
| struct brw_vue_prog_data *prog_data; |
| vec4_visitor *v; |
| }; |
| |
| class dead_code_eliminate_vec4_visitor : public vec4_visitor |
| { |
| public: |
| dead_code_eliminate_vec4_visitor(struct brw_compiler *compiler, |
| nir_shader *shader, |
| struct brw_vue_prog_data *prog_data) |
| : vec4_visitor(compiler, NULL, NULL, prog_data, shader, NULL, |
| false /* no_spills */, -1) |
| { |
| prog_data->dispatch_mode = DISPATCH_MODE_4X2_DUAL_OBJECT; |
| } |
| |
| protected: |
| virtual dst_reg *make_reg_for_system_value(int /* location */) |
| { |
| unreachable("Not reached"); |
| } |
| |
| virtual void setup_payload() |
| { |
| unreachable("Not reached"); |
| } |
| |
| virtual void emit_prolog() |
| { |
| unreachable("Not reached"); |
| } |
| |
| virtual void emit_thread_end() |
| { |
| unreachable("Not reached"); |
| } |
| |
| virtual void emit_urb_write_header(int /* mrf */) |
| { |
| unreachable("Not reached"); |
| } |
| |
| virtual vec4_instruction *emit_urb_write_opcode(bool /* complete */) |
| { |
| unreachable("Not reached"); |
| } |
| }; |
| |
| |
| void dead_code_eliminate_test::SetUp() |
| { |
| ctx = (struct gl_context *)calloc(1, sizeof(*ctx)); |
| compiler = (struct brw_compiler *)calloc(1, sizeof(*compiler)); |
| devinfo = (struct gen_device_info *)calloc(1, sizeof(*devinfo)); |
| prog_data = (struct brw_vue_prog_data *)calloc(1, sizeof(*prog_data)); |
| compiler->devinfo = devinfo; |
| |
| nir_shader *shader = |
| nir_shader_create(NULL, MESA_SHADER_VERTEX, NULL, NULL); |
| |
| v = new dead_code_eliminate_vec4_visitor(compiler, shader, prog_data); |
| |
| devinfo->gen = 4; |
| } |
| |
| static void |
| dead_code_eliminate(vec4_visitor *v) |
| { |
| bool print = false; |
| |
| if (print) { |
| fprintf(stderr, "instructions before:\n"); |
| v->dump_instructions(); |
| } |
| |
| v->calculate_cfg(); |
| v->dead_code_eliminate(); |
| |
| if (print) { |
| fprintf(stderr, "instructions after:\n"); |
| v->dump_instructions(); |
| } |
| } |
| |
| TEST_F(dead_code_eliminate_test, some_dead_channels_all_flags_used) |
| { |
| const vec4_builder bld = vec4_builder(v).at_end(); |
| src_reg r1 = src_reg(v, glsl_type::vec4_type); |
| src_reg r2 = src_reg(v, glsl_type::vec4_type); |
| src_reg r3 = src_reg(v, glsl_type::vec4_type); |
| src_reg r4 = src_reg(v, glsl_type::vec4_type); |
| src_reg r5 = src_reg(v, glsl_type::vec4_type); |
| src_reg r6 = src_reg(v, glsl_type::vec4_type); |
| |
| /* Sequence like the following should not be modified by DCE. |
| * |
| * cmp.l.f0(8) g4<1>F g2<4,4,1>.wF g1<4,4,1>.xF |
| * mov(8) g5<1>.xF g4<4,4,1>.xF |
| * (+f0.x) sel(8) g6<1>UD g3<4>UD g6<4>UD |
| */ |
| vec4_instruction *test_cmp = |
| bld.CMP(dst_reg(r4), r2, r1, BRW_CONDITIONAL_L); |
| |
| test_cmp->src[0].swizzle = BRW_SWIZZLE_WWWW; |
| test_cmp->src[1].swizzle = BRW_SWIZZLE_XXXX; |
| |
| vec4_instruction *test_mov = |
| bld.MOV(dst_reg(r5), r4); |
| |
| test_mov->dst.writemask = WRITEMASK_X; |
| test_mov->src[0].swizzle = BRW_SWIZZLE_XXXX; |
| |
| vec4_instruction *test_sel = |
| bld.SEL(dst_reg(r6), r3, r6); |
| |
| set_predicate(BRW_PREDICATE_NORMAL, test_sel); |
| |
| /* The scratch write is here just to make r5 and r6 be live so that the |
| * whole program doesn't get eliminated by DCE. |
| */ |
| v->emit(v->SCRATCH_WRITE(dst_reg(r4), r6, r5)); |
| |
| dead_code_eliminate(v); |
| |
| EXPECT_EQ(test_cmp->dst.writemask, WRITEMASK_XYZW); |
| } |